stream.cpp@ 68121

Last change on this file since 68121 was 62592, checked in by vboxsync, 8 years ago
IPRT: More unused parameters and undefined preprocessor macor warning (C4668) fixes/workarounds. The latter triggers in stdint.h from the compiler and in windows SDK/DDK headers.
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 34.5 KB

Line
1	/* $Id: stream.cpp 62592 2016-07-27 13:24:48Z vboxsync $ */
2	/** @file
3	* IPRT - I/O Stream.
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28
29	#if defined(RT_OS_LINUX) /* PORTME: check for the _unlocked functions in stdio.h */
30	#define HAVE_FWRITE_UNLOCKED
31	#endif
32
33
34	/*********************************************************************************************************************************
35	* Header Files *
36	*********************************************************************************************************************************/
37	#include <iprt/stream.h>
38	#include "internal/iprt.h"
39
40	#include <iprt/asm.h>
41	#ifndef HAVE_FWRITE_UNLOCKED
42	# include <iprt/critsect.h>
43	#endif
44	#include <iprt/string.h>
45	#include <iprt/assert.h>
46	#include <iprt/alloc.h>
47	#include <iprt/err.h>
48	#include <iprt/param.h>
49	#include <iprt/string.h>
50
51	#include "internal/alignmentchecks.h"
52	#include "internal/magics.h"
53
54	#include <stdio.h>
55	#include <errno.h>
56	#if defined(RT_OS_WINDOWS) \|\| defined(RT_OS_OS2)
57	# include <io.h>
58	# include <fcntl.h>
59	#endif
60	#ifdef RT_OS_WINDOWS
61	# include <iprt/win/windows.h>
62	#endif
63	#ifndef RT_OS_WINDOWS
64	# include <termios.h>
65	# include <unistd.h>
66	#endif
67
68	#ifdef RT_OS_OS2
69	# define _O_TEXT O_TEXT
70	# define _O_BINARY O_BINARY
71	#endif
72
73
74	/*********************************************************************************************************************************
75	* Structures and Typedefs *
76	*********************************************************************************************************************************/
77	/**
78	* File stream.
79	*/
80	typedef struct RTSTREAM
81	{
82	/** Magic value used to validate the stream. (RTSTREAM_MAGIC) */
83	uint32_t u32Magic;
84	/** File stream error. */
85	int32_t volatile i32Error;
86	/** Pointer to the LIBC file stream. */
87	FILE *pFile;
88	/** Stream is using the current process code set. */
89	bool fCurrentCodeSet;
90	/** Whether the stream was opened in binary mode. */
91	bool fBinary;
92	/** Whether to recheck the stream mode before writing. */
93	bool fRecheckMode;
94	#ifndef HAVE_FWRITE_UNLOCKED
95	/** Critical section for serializing access to the stream. */
96	PRTCRITSECT pCritSect;
97	#endif
98	} RTSTREAM;
99
100
101	/*********************************************************************************************************************************
102	* Global Variables *
103	*********************************************************************************************************************************/
104	/** The standard input stream. */
105	static RTSTREAM g_StdIn =
106	{
107	RTSTREAM_MAGIC,
108	0,
109	stdin,
110	/.fCurrentCodeSet = / true,
111	/.fBinary = / false,
112	/.fRecheckMode = / true
113	#ifndef HAVE_FWRITE_UNLOCKED
114	, NULL
115	#endif
116	};
117
118	/** The standard error stream. */
119	static RTSTREAM g_StdErr =
120	{
121	RTSTREAM_MAGIC,
122	0,
123	stderr,
124	/.fCurrentCodeSet = / true,
125	/.fBinary = / false,
126	/.fRecheckMode = / true
127	#ifndef HAVE_FWRITE_UNLOCKED
128	, NULL
129	#endif
130	};
131
132	/** The standard output stream. */
133	static RTSTREAM g_StdOut =
134	{
135	RTSTREAM_MAGIC,
136	0,
137	stdout,
138	/.fCurrentCodeSet = / true,
139	/.fBinary = / false,
140	/.fRecheckMode = / true
141	#ifndef HAVE_FWRITE_UNLOCKED
142	, NULL
143	#endif
144	};
145
146	/** Pointer to the standard input stream. */
147	RTDATADECL(PRTSTREAM) g_pStdIn = &g_StdIn;
148
149	/** Pointer to the standard output stream. */
150	RTDATADECL(PRTSTREAM) g_pStdErr = &g_StdErr;
151
152	/** Pointer to the standard output stream. */
153	RTDATADECL(PRTSTREAM) g_pStdOut = &g_StdOut;
154
155
156	#ifndef HAVE_FWRITE_UNLOCKED
157	/**
158	* Allocates and acquires the lock for the stream.
159	*
160	* @returns IPRT status code.
161	* @param pStream The stream (valid).
162	*/
163	static int rtStrmAllocLock(PRTSTREAM pStream)
164	{
165	Assert(pStream->pCritSect == NULL);
166
167	PRTCRITSECT pCritSect = (PRTCRITSECT)RTMemAlloc(sizeof(*pCritSect));
168	if (!pCritSect)
169	return VERR_NO_MEMORY;
170
171	/* The native stream lock are normally not recursive. */
172	int rc = RTCritSectInitEx(pCritSect, RTCRITSECT_FLAGS_NO_NESTING,
173	NIL_RTLOCKVALCLASS, RTLOCKVAL_SUB_CLASS_NONE, "RTSemSpinMutex");
174	if (RT_SUCCESS(rc))
175	{
176	rc = RTCritSectEnter(pCritSect);
177	if (RT_SUCCESS(rc))
178	{
179	if (RT_LIKELY(ASMAtomicCmpXchgPtr(&pStream->pCritSect, pCritSect, NULL)))
180	return VINF_SUCCESS;
181
182	RTCritSectLeave(pCritSect);
183	}
184	RTCritSectDelete(pCritSect);
185	}
186	RTMemFree(pCritSect);
187
188	/* Handle the lost race case... */
189	pCritSect = ASMAtomicReadPtrT(&pStream->pCritSect, PRTCRITSECT);
190	if (pCritSect)
191	return RTCritSectEnter(pCritSect);
192
193	return rc;
194	}
195	#endif /* !HAVE_FWRITE_UNLOCKED */
196
197
198	/**
199	* Locks the stream. May have to allocate the lock as well.
200	*
201	* @param pStream The stream (valid).
202	*/
203	DECLINLINE(void) rtStrmLock(PRTSTREAM pStream)
204	{
205	#ifdef HAVE_FWRITE_UNLOCKED
206	flockfile(pStream->pFile);
207	#else
208	if (RT_LIKELY(pStream->pCritSect))
209	RTCritSectEnter(pStream->pCritSect);
210	else
211	rtStrmAllocLock(pStream);
212	#endif
213	}
214
215
216	/**
217	* Unlocks the stream.
218	*
219	* @param pStream The stream (valid).
220	*/
221	DECLINLINE(void) rtStrmUnlock(PRTSTREAM pStream)
222	{
223	#ifdef HAVE_FWRITE_UNLOCKED
224	funlockfile(pStream->pFile);
225	#else
226	if (RT_LIKELY(pStream->pCritSect))
227	RTCritSectLeave(pStream->pCritSect);
228	#endif
229	}
230
231
232	/**
233	* Opens a file stream.
234	*
235	* @returns iprt status code.
236	* @param pszFilename Path to the file to open.
237	* @param pszMode The open mode. See fopen() standard.
238	* Format: <a\|r\|w>[+][b\|t]
239	* @param ppStream Where to store the opened stream.
240	*/
241	RTR3DECL(int) RTStrmOpen(const char pszFilename, const char pszMode, PRTSTREAM *ppStream)
242	{
243	/*
244	* Validate input.
245	*/
246	if (!pszMode \|\| !*pszMode)
247	{
248	AssertMsgFailed(("No pszMode!\n"));
249	return VERR_INVALID_PARAMETER;
250	}
251	if (!pszFilename)
252	{
253	AssertMsgFailed(("No pszFilename!\n"));
254	return VERR_INVALID_PARAMETER;
255	}
256	bool fOk = true;
257	bool fBinary = false;
258	switch (*pszMode)
259	{
260	case 'a':
261	case 'w':
262	case 'r':
263	switch (pszMode[1])
264	{
265	case '\0':
266	break;
267
268	case '+':
269	switch (pszMode[2])
270	{
271	case '\0':
272	break;
273
274	//case 't':
275	// break;
276
277	case 'b':
278	fBinary = true;
279	break;
280
281	default:
282	fOk = false;
283	break;
284	}
285	break;
286
287	//case 't':
288	// break;
289
290	case 'b':
291	fBinary = true;
292	break;
293
294	default:
295	fOk = false;
296	break;
297	}
298	break;
299	default:
300	fOk = false;
301	break;
302	}
303	if (!fOk)
304	{
305	AssertMsgFailed(("Invalid pszMode='%s', '<a\|r\|w>[+][b\|t]'\n", pszMode));
306	return VINF_SUCCESS;
307	}
308
309	/*
310	* Allocate the stream handle and try open it.
311	*/
312	PRTSTREAM pStream = (PRTSTREAM)RTMemAlloc(sizeof(*pStream));
313	if (pStream)
314	{
315	pStream->u32Magic = RTSTREAM_MAGIC;
316	pStream->i32Error = VINF_SUCCESS;
317	pStream->fCurrentCodeSet = false;
318	pStream->fBinary = fBinary;
319	pStream->fRecheckMode = false;
320	#ifndef HAVE_FWRITE_UNLOCKED
321	pStream->pCritSect = NULL;
322	#endif /* HAVE_FWRITE_UNLOCKED */
323	pStream->pFile = fopen(pszFilename, pszMode);
324	if (pStream->pFile)
325	{
326	*ppStream = pStream;
327	return VINF_SUCCESS;
328	}
329	RTMemFree(pStream);
330	return RTErrConvertFromErrno(errno);
331	}
332	return VERR_NO_MEMORY;
333	}
334
335
336	/**
337	* Opens a file stream.
338	*
339	* @returns iprt status code.
340	* @param pszMode The open mode. See fopen() standard.
341	* Format: <a\|r\|w>[+][b\|t]
342	* @param ppStream Where to store the opened stream.
343	* @param pszFilenameFmt Filename path format string.
344	* @param args Arguments to the format string.
345	*/
346	RTR3DECL(int) RTStrmOpenFV(const char pszMode, PRTSTREAM ppStream, const char *pszFilenameFmt, va_list args)
347	{
348	int rc;
349	char szFilename[RTPATH_MAX];
350	size_t cch = RTStrPrintfV(szFilename, sizeof(szFilename), pszFilenameFmt, args);
351	if (cch < sizeof(szFilename))
352	rc = RTStrmOpen(szFilename, pszMode, ppStream);
353	else
354	{
355	AssertMsgFailed(("The filename is too long cch=%d\n", cch));
356	rc = VERR_FILENAME_TOO_LONG;
357	}
358	return rc;
359	}
360
361
362	/**
363	* Opens a file stream.
364	*
365	* @returns iprt status code.
366	* @param pszMode The open mode. See fopen() standard.
367	* Format: <a\|r\|w>[+][b\|t]
368	* @param ppStream Where to store the opened stream.
369	* @param pszFilenameFmt Filename path format string.
370	* @param ... Arguments to the format string.
371	*/
372	RTR3DECL(int) RTStrmOpenF(const char pszMode, PRTSTREAM ppStream, const char *pszFilenameFmt, ...)
373	{
374	va_list args;
375	va_start(args, pszFilenameFmt);
376	int rc = RTStrmOpenFV(pszMode, ppStream, pszFilenameFmt, args);
377	va_end(args);
378	return rc;
379	}
380
381
382	/**
383	* Closes the specified stream.
384	*
385	* @returns iprt status code.
386	* @param pStream The stream to close.
387	*/
388	RTR3DECL(int) RTStrmClose(PRTSTREAM pStream)
389	{
390	if (!pStream)
391	return VINF_SUCCESS;
392	AssertReturn(RT_VALID_PTR(pStream) && pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_PARAMETER);
393
394	if (!fclose(pStream->pFile))
395	{
396	pStream->u32Magic = 0xdeaddead;
397	pStream->pFile = NULL;
398	#ifndef HAVE_FWRITE_UNLOCKED
399	if (pStream->pCritSect)
400	{
401	RTCritSectEnter(pStream->pCritSect);
402	RTCritSectLeave(pStream->pCritSect);
403	RTCritSectDelete(pStream->pCritSect);
404	RTMemFree(pStream->pCritSect);
405	pStream->pCritSect = NULL;
406	}
407	#endif
408	RTMemFree(pStream);
409	return VINF_SUCCESS;
410	}
411
412	return RTErrConvertFromErrno(errno);
413	}
414
415
416	/**
417	* Get the pending error of the stream.
418	*
419	* @returns iprt status code. of the stream.
420	* @param pStream The stream.
421	*/
422	RTR3DECL(int) RTStrmError(PRTSTREAM pStream)
423	{
424	AssertReturn(RT_VALID_PTR(pStream) && pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_PARAMETER);
425	return pStream->i32Error;
426	}
427
428
429	/**
430	* Clears stream error condition.
431	*
432	* All stream operations save RTStrmClose and this will fail
433	* while an error is asserted on the stream
434	*
435	* @returns iprt status code.
436	* @param pStream The stream.
437	*/
438	RTR3DECL(int) RTStrmClearError(PRTSTREAM pStream)
439	{
440	AssertReturn(RT_VALID_PTR(pStream) && pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_PARAMETER);
441
442	clearerr(pStream->pFile);
443	ASMAtomicWriteS32(&pStream->i32Error, VINF_SUCCESS);
444	return VINF_SUCCESS;
445	}
446
447
448	RTR3DECL(int) RTStrmSetMode(PRTSTREAM pStream, int fBinary, int fCurrentCodeSet)
449	{
450	AssertPtrReturn(pStream, VERR_INVALID_HANDLE);
451	AssertReturn(pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_HANDLE);
452	AssertReturn((unsigned)(fBinary + 1) <= 2, VERR_INVALID_PARAMETER);
453	AssertReturn((unsigned)(fCurrentCodeSet + 1) <= 2, VERR_INVALID_PARAMETER);
454
455	rtStrmLock(pStream);
456
457	if (fBinary != -1)
458	{
459	pStream->fBinary = RT_BOOL(fBinary);
460	pStream->fRecheckMode = true;
461	}
462
463	if (fCurrentCodeSet != -1)
464	pStream->fCurrentCodeSet = RT_BOOL(fCurrentCodeSet);
465
466	rtStrmUnlock(pStream);
467
468	return VINF_SUCCESS;
469	}
470
471
472	RTR3DECL(int) RTStrmInputGetEchoChars(PRTSTREAM pStream, bool *pfEchoChars)
473	{
474	int rc = VINF_SUCCESS;
475
476	AssertPtrReturn(pStream, VERR_INVALID_HANDLE);
477	AssertReturn(pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_HANDLE);
478	AssertPtrReturn(pfEchoChars, VERR_INVALID_POINTER);
479
480	int fh = fileno(pStream->pFile);
481	if (isatty(fh))
482	{
483	#ifdef RT_OS_WINDOWS
484	DWORD dwMode;
485	HANDLE hCon = (HANDLE)_get_osfhandle(fh);
486	if (GetConsoleMode(hCon, &dwMode))
487	*pfEchoChars = RT_BOOL(dwMode & ENABLE_ECHO_INPUT);
488	else
489	rc = RTErrConvertFromWin32(GetLastError());
490	#else
491	struct termios Termios;
492
493	int rcPosix = tcgetattr(fh, &Termios);
494	if (!rcPosix)
495	*pfEchoChars = RT_BOOL(Termios.c_lflag & ECHO);
496	else
497	rc = RTErrConvertFromErrno(errno);
498	#endif
499	}
500	else
501	rc = VERR_INVALID_HANDLE;
502
503	return rc;
504	}
505
506
507	RTR3DECL(int) RTStrmInputSetEchoChars(PRTSTREAM pStream, bool fEchoChars)
508	{
509	int rc = VINF_SUCCESS;
510
511	AssertPtrReturn(pStream, VERR_INVALID_HANDLE);
512	AssertReturn(pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_HANDLE);
513
514	int fh = fileno(pStream->pFile);
515	if (isatty(fh))
516	{
517	#ifdef RT_OS_WINDOWS
518	DWORD dwMode;
519	HANDLE hCon = (HANDLE)_get_osfhandle(fh);
520	if (GetConsoleMode(hCon, &dwMode))
521	{
522	if (fEchoChars)
523	dwMode \|= ENABLE_ECHO_INPUT;
524	else
525	dwMode &= ~ENABLE_ECHO_INPUT;
526	if (!SetConsoleMode(hCon, dwMode))
527	rc = RTErrConvertFromWin32(GetLastError());
528	}
529	else
530	rc = RTErrConvertFromWin32(GetLastError());
531	#else
532	struct termios Termios;
533
534	int rcPosix = tcgetattr(fh, &Termios);
535	if (!rcPosix)
536	{
537	if (fEchoChars)
538	Termios.c_lflag \|= ECHO;
539	else
540	Termios.c_lflag &= ~ECHO;
541
542	rcPosix = tcsetattr(fh, TCSAFLUSH, &Termios);
543	if (rcPosix != 0)
544	rc = RTErrConvertFromErrno(errno);
545	}
546	else
547	rc = RTErrConvertFromErrno(errno);
548	#endif
549	}
550	else
551	rc = VERR_INVALID_HANDLE;
552
553	return rc;
554	}
555
556
557	/**
558	* Rewinds the stream.
559	*
560	* Stream errors will be reset on success.
561	*
562	* @returns IPRT status code.
563	*
564	* @param pStream The stream.
565	*
566	* @remarks Not all streams are rewindable and that behavior is currently
567	* undefined for those.
568	*/
569	RTR3DECL(int) RTStrmRewind(PRTSTREAM pStream)
570	{
571	AssertPtrReturn(pStream, VERR_INVALID_HANDLE);
572	AssertReturn(pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_HANDLE);
573
574	int rc;
575	clearerr(pStream->pFile);
576	errno = 0;
577	if (!fseek(pStream->pFile, 0, SEEK_SET))
578	{
579	ASMAtomicWriteS32(&pStream->i32Error, VINF_SUCCESS);
580	rc = VINF_SUCCESS;
581	}
582	else
583	{
584	rc = RTErrConvertFromErrno(errno);
585	ASMAtomicWriteS32(&pStream->i32Error, rc);
586	}
587
588	return rc;
589	}
590
591
592	/**
593	* Recheck the stream mode.
594	*
595	* @param pStream The stream (locked).
596	*/
597	static void rtStreamRecheckMode(PRTSTREAM pStream)
598	{
599	#if defined(RT_OS_WINDOWS) \|\| defined(RT_OS_OS2)
600	int fh = fileno(pStream->pFile);
601	if (fh >= 0)
602	{
603	int fExpected = pStream->fBinary ? _O_BINARY : _O_TEXT;
604	int fActual = _setmode(fh, fExpected);
605	if (fActual != -1 && fExpected != (fActual & (_O_BINARY \| _O_TEXT)))
606	{
607	fActual = _setmode(fh, fActual & (_O_BINARY \| _O_TEXT));
608	pStream->fBinary = !(fActual & _O_TEXT);
609	}
610	}
611	#else
612	NOREF(pStream);
613	#endif
614	pStream->fRecheckMode = false;
615	}
616
617
618	/**
619	* Reads from a file stream.
620	*
621	* @returns iprt status code.
622	* @param pStream The stream.
623	* @param pvBuf Where to put the read bits.
624	* Must be cbRead bytes or more.
625	* @param cbRead Number of bytes to read.
626	* @param pcbRead Where to store the number of bytes actually read.
627	* If NULL cbRead bytes are read or an error is returned.
628	*/
629	RTR3DECL(int) RTStrmReadEx(PRTSTREAM pStream, void pvBuf, size_t cbRead, size_t pcbRead)
630	{
631	AssertReturn(RT_VALID_PTR(pStream) && pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_PARAMETER);
632
633	int rc = pStream->i32Error;
634	if (RT_SUCCESS(rc))
635	{
636	if (pStream->fRecheckMode)
637	rtStreamRecheckMode(pStream);
638
639	if (pcbRead)
640	{
641	/*
642	* Can do with a partial read.
643	*/
644	*pcbRead = fread(pvBuf, 1, cbRead, pStream->pFile);
645	if ( *pcbRead == cbRead
646	\|\| !ferror(pStream->pFile))
647	return VINF_SUCCESS;
648	if (feof(pStream->pFile))
649	{
650	if (*pcbRead)
651	return VINF_EOF;
652	rc = VERR_EOF;
653	}
654	else if (ferror(pStream->pFile))
655	rc = VERR_READ_ERROR;
656	else
657	{
658	AssertMsgFailed(("This shouldn't happen\n"));
659	rc = VERR_INTERNAL_ERROR;
660	}
661	}
662	else
663	{
664	/*
665	* Must read it all!
666	*/
667	if (fread(pvBuf, cbRead, 1, pStream->pFile) == 1)
668	return VINF_SUCCESS;
669
670	/* possible error/eof. */
671	if (feof(pStream->pFile))
672	rc = VERR_EOF;
673	else if (ferror(pStream->pFile))
674	rc = VERR_READ_ERROR;
675	else
676	{
677	AssertMsgFailed(("This shouldn't happen\n"));
678	rc = VERR_INTERNAL_ERROR;
679	}
680	}
681	ASMAtomicWriteS32(&pStream->i32Error, rc);
682	}
683	return rc;
684	}
685
686
687	/**
688	* Check if the input text is valid UTF-8.
689	*
690	* @returns true/false.
691	* @param pvBuf Pointer to the buffer.
692	* @param cbBuf Size of the buffer.
693	*/
694	static bool rtStrmIsUtf8Text(const void *pvBuf, size_t cbBuf)
695	{
696	NOREF(pvBuf);
697	NOREF(cbBuf);
698	/** @todo not sure this is a good idea... Better redefine RTStrmWrite. */
699	return false;
700	}
701
702
703	#ifdef RT_OS_WINDOWS
704	/**
705	* Check if the stream is for a Window console.
706	*
707	* @returns true / false.
708	* @param pStream The stream.
709	* @param phCon Where to return the console handle.
710	*/
711	static bool rtStrmIsConsoleUnlocked(PRTSTREAM pStream, HANDLE *phCon)
712	{
713	int fh = fileno(pStream->pFile);
714	if (isatty(fh))
715	{
716	DWORD dwMode;
717	HANDLE hCon = (HANDLE)_get_osfhandle(fh);
718	if (GetConsoleMode(hCon, &dwMode))
719	{
720	*phCon = hCon;
721	return true;
722	}
723	}
724	return false;
725	}
726	#endif /* RT_OS_WINDOWS */
727
728
729	/**
730	* Internal write API, stream lock already held.
731	*
732	* @returns IPRT status code.
733	* @param pStream The stream.
734	* @param pvBuf What to write.
735	* @param cbWrite How much to write.
736	* @param pcbWritten Where to optionally return the number of bytes
737	* written.
738	* @param fSureIsText Set if we're sure this is UTF-8 text already.
739	*/
740	static int rtStrmWriteLocked(PRTSTREAM pStream, const void pvBuf, size_t cbWrite, size_t pcbWritten,
741	bool fSureIsText)
742	{
743	int rc = pStream->i32Error;
744	if (RT_FAILURE(rc))
745	return rc;
746	if (pStream->fRecheckMode)
747	rtStreamRecheckMode(pStream);
748
749	#ifdef RT_OS_WINDOWS
750	/*
751	* Use the unicode console API when possible in order to avoid stuff
752	* getting lost in unnecessary code page translations.
753	*/
754	HANDLE hCon;
755	if (rtStrmIsConsoleUnlocked(pStream, &hCon))
756	{
757	# ifdef HAVE_FWRITE_UNLOCKED
758	if (!fflush_unlocked(pStream->pFile))
759	# else
760	if (!fflush(pStream->pFile))
761	# endif
762	{
763	/** @todo Consider buffering later. For now, we'd rather correct output than
764	* fast output. */
765	DWORD cwcWritten = 0;
766	PRTUTF16 pwszSrc = NULL;
767	size_t cwcSrc = 0;
768	rc = RTStrToUtf16Ex((const char *)pvBuf, cbWrite, &pwszSrc, 0, &cwcSrc);
769	if (RT_SUCCESS(rc))
770	{
771	if (!WriteConsoleW(hCon, pwszSrc, (DWORD)cwcSrc, &cwcWritten, NULL))
772	{
773	/* try write char-by-char to avoid heap problem. */
774	cwcWritten = 0;
775	while (cwcWritten != cwcSrc)
776	{
777	DWORD cwcThis;
778	if (!WriteConsoleW(hCon, &pwszSrc[cwcWritten], 1, &cwcThis, NULL))
779	{
780	if (!pcbWritten \|\| cwcWritten == 0)
781	rc = RTErrConvertFromErrno(GetLastError());
782	break;
783	}
784	if (cwcThis != 1) /* Unable to write current char (amount)? */
785	break;
786	cwcWritten++;
787	}
788	}
789	if (RT_SUCCESS(rc))
790	{
791	if (cwcWritten == cwcSrc)
792	{
793	if (pcbWritten)
794	*pcbWritten = cbWrite;
795	}
796	else if (pcbWritten)
797	{
798	PCRTUTF16 pwszCur = pwszSrc;
799	const char pszCur = (const char )pvBuf;
800	while ((uintptr_t)(pwszCur - pwszSrc) < cwcWritten)
801	{
802	RTUNICP CpIgnored;
803	RTUtf16GetCpEx(&pwszCur, &CpIgnored);
804	RTStrGetCpEx(&pszCur, &CpIgnored);
805	}
806	pcbWritten = pszCur - (const char )pvBuf;
807	}
808	else
809	rc = VERR_WRITE_ERROR;
810	}
811	RTUtf16Free(pwszSrc);
812	}
813	}
814	else
815	rc = RTErrConvertFromErrno(errno);
816	if (RT_FAILURE(rc))
817	ASMAtomicWriteS32(&pStream->i32Error, rc);
818	return rc;
819	}
820	#endif /* RT_OS_WINDOWS */
821
822	/*
823	* If we're sure it's text output, convert it from UTF-8 to the current
824	* code page before printing it.
825	*
826	* Note! Partial writes are not supported in this scenario because we
827	* cannot easily report back a written length matching the input.
828	*/
829	/** @todo Skip this if the current code set is UTF-8. */
830	if ( pStream->fCurrentCodeSet
831	&& !pStream->fBinary
832	&& ( fSureIsText
833	\|\| rtStrmIsUtf8Text(pvBuf, cbWrite))
834	)
835	{
836	char *pszSrcFree = NULL;
837	const char pszSrc = (const char )pvBuf;
838	if (pszSrc[cbWrite])
839	{
840	pszSrc = pszSrcFree = RTStrDupN(pszSrc, cbWrite);
841	if (pszSrc == NULL)
842	rc = VERR_NO_STR_MEMORY;
843	}
844	if (RT_SUCCESS(rc))
845	{
846	char *pszSrcCurCP;
847	rc = RTStrUtf8ToCurrentCP(&pszSrcCurCP, pszSrc);
848	if (RT_SUCCESS(rc))
849	{
850	size_t cchSrcCurCP = strlen(pszSrcCurCP);
851	IPRT_ALIGNMENT_CHECKS_DISABLE(); /* glibc / mempcpy again */
852	#ifdef HAVE_FWRITE_UNLOCKED
853	ssize_t cbWritten = fwrite_unlocked(pszSrcCurCP, cchSrcCurCP, 1, pStream->pFile);
854	#else
855	ssize_t cbWritten = fwrite(pszSrcCurCP, cchSrcCurCP, 1, pStream->pFile);
856	#endif
857	IPRT_ALIGNMENT_CHECKS_ENABLE();
858	if (cbWritten == 1)
859	{
860	if (pcbWritten)
861	*pcbWritten = cbWrite;
862	}
863	#ifdef HAVE_FWRITE_UNLOCKED
864	else if (!ferror_unlocked(pStream->pFile))
865	#else
866	else if (!ferror(pStream->pFile))
867	#endif
868	{
869	if (pcbWritten)
870	*pcbWritten = 0;
871	}
872	else
873	rc = VERR_WRITE_ERROR;
874	RTStrFree(pszSrcCurCP);
875	}
876	RTStrFree(pszSrcFree);
877	}
878
879	if (RT_FAILURE(rc))
880	ASMAtomicWriteS32(&pStream->i32Error, rc);
881	return rc;
882	}
883
884	/*
885	* Otherwise, just write it as-is.
886	*/
887	if (pcbWritten)
888	{
889	IPRT_ALIGNMENT_CHECKS_DISABLE(); /* glibc / mempcpy again */
890	#ifdef HAVE_FWRITE_UNLOCKED
891	*pcbWritten = fwrite_unlocked(pvBuf, 1, cbWrite, pStream->pFile);
892	#else
893	*pcbWritten = fwrite(pvBuf, 1, cbWrite, pStream->pFile);
894	#endif
895	IPRT_ALIGNMENT_CHECKS_ENABLE();
896	if ( *pcbWritten == cbWrite
897	#ifdef HAVE_FWRITE_UNLOCKED
898	\|\| !ferror_unlocked(pStream->pFile))
899	#else
900	\|\| !ferror(pStream->pFile))
901	#endif
902	return VINF_SUCCESS;
903	rc = VERR_WRITE_ERROR;
904	}
905	else
906	{
907	/* Must write it all! */
908	IPRT_ALIGNMENT_CHECKS_DISABLE(); /* glibc / mempcpy again */
909	#ifdef HAVE_FWRITE_UNLOCKED
910	size_t cbWritten = fwrite_unlocked(pvBuf, cbWrite, 1, pStream->pFile);
911	#else
912	size_t cbWritten = fwrite(pvBuf, cbWrite, 1, pStream->pFile);
913	#endif
914	IPRT_ALIGNMENT_CHECKS_ENABLE();
915	if (cbWritten == 1)
916	return VINF_SUCCESS;
917	#ifdef HAVE_FWRITE_UNLOCKED
918	if (!ferror_unlocked(pStream->pFile))
919	#else
920	if (!ferror(pStream->pFile))
921	#endif
922	return VINF_SUCCESS; /* WEIRD! But anyway... */
923
924	rc = VERR_WRITE_ERROR;
925	}
926	ASMAtomicWriteS32(&pStream->i32Error, rc);
927
928	return rc;
929	}
930
931
932	/**
933	* Internal write API.
934	*
935	* @returns IPRT status code.
936	* @param pStream The stream.
937	* @param pvBuf What to write.
938	* @param cbWrite How much to write.
939	* @param pcbWritten Where to optionally return the number of bytes
940	* written.
941	* @param fSureIsText Set if we're sure this is UTF-8 text already.
942	*/
943	static int rtStrmWrite(PRTSTREAM pStream, const void pvBuf, size_t cbWrite, size_t pcbWritten, bool fSureIsText)
944	{
945	rtStrmLock(pStream);
946	int rc = rtStrmWriteLocked(pStream, pvBuf, cbWrite, pcbWritten, fSureIsText);
947	rtStrmUnlock(pStream);
948	return rc;
949	}
950
951
952	/**
953	* Writes to a file stream.
954	*
955	* @returns iprt status code.
956	* @param pStream The stream.
957	* @param pvBuf Where to get the bits to write from.
958	* @param cbWrite Number of bytes to write.
959	* @param pcbWritten Where to store the number of bytes actually written.
960	* If NULL cbWrite bytes are written or an error is returned.
961	*/
962	RTR3DECL(int) RTStrmWriteEx(PRTSTREAM pStream, const void pvBuf, size_t cbWrite, size_t pcbWritten)
963	{
964	AssertReturn(RT_VALID_PTR(pStream) && pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_PARAMETER);
965	return rtStrmWrite(pStream, pvBuf, cbWrite, pcbWritten, false);
966	}
967
968
969	/**
970	* Reads a character from a file stream.
971	*
972	* @returns The char as an unsigned char cast to int.
973	* @returns -1 on failure.
974	* @param pStream The stream.
975	*/
976	RTR3DECL(int) RTStrmGetCh(PRTSTREAM pStream)
977	{
978	unsigned char ch;
979	int rc = RTStrmReadEx(pStream, &ch, 1, NULL);
980	if (RT_SUCCESS(rc))
981	return ch;
982	return -1;
983	}
984
985
986	/**
987	* Writes a character to a file stream.
988	*
989	* @returns iprt status code.
990	* @param pStream The stream.
991	* @param ch The char to write.
992	*/
993	RTR3DECL(int) RTStrmPutCh(PRTSTREAM pStream, int ch)
994	{
995	return rtStrmWrite(pStream, &ch, 1, NULL, true /fSureIsText/);
996	}
997
998
999	/**
1000	* Writes a string to a file stream.
1001	*
1002	* @returns iprt status code.
1003	* @param pStream The stream.
1004	* @param pszString The string to write.
1005	* No newlines or anything is appended or prepended.
1006	* The terminating '\\0' is not written, of course.
1007	*/
1008	RTR3DECL(int) RTStrmPutStr(PRTSTREAM pStream, const char *pszString)
1009	{
1010	size_t cch = strlen(pszString);
1011	return rtStrmWrite(pStream, pszString, cch, NULL, true /fSureIsText/);
1012	}
1013
1014
1015	RTR3DECL(int) RTStrmGetLine(PRTSTREAM pStream, char *pszString, size_t cbString)
1016	{
1017	AssertReturn(RT_VALID_PTR(pStream) && pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_PARAMETER);
1018	int rc;
1019	if (pszString && cbString > 1)
1020	{
1021	rc = pStream->i32Error;
1022	if (RT_SUCCESS(rc))
1023	{
1024	cbString--; /* save space for the terminator. */
1025	rtStrmLock(pStream);
1026	for (;;)
1027	{
1028	#ifdef HAVE_FWRITE_UNLOCKED /** @todo darwin + freebsd(?) has fgetc_unlocked but not fwrite_unlocked, optimize... */
1029	int ch = fgetc_unlocked(pStream->pFile);
1030	#else
1031	int ch = fgetc(pStream->pFile);
1032	#endif
1033
1034	/* Deal with \r\n sequences here. We'll return lone CR, but
1035	treat CRLF as LF. */
1036	if (ch == '\r')
1037	{
1038	#ifdef HAVE_FWRITE_UNLOCKED /** @todo darwin + freebsd(?) has fgetc_unlocked but not fwrite_unlocked, optimize... */
1039	ch = fgetc_unlocked(pStream->pFile);
1040	#else
1041	ch = fgetc(pStream->pFile);
1042	#endif
1043	if (ch == '\n')
1044	break;
1045
1046	*pszString++ = '\r';
1047	if (--cbString <= 0)
1048	{
1049	/* yeah, this is an error, we dropped a character. */
1050	rc = VERR_BUFFER_OVERFLOW;
1051	break;
1052	}
1053	}
1054
1055	/* Deal with end of file. */
1056	if (ch == EOF)
1057	{
1058	#ifdef HAVE_FWRITE_UNLOCKED
1059	if (feof_unlocked(pStream->pFile))
1060	#else
1061	if (feof(pStream->pFile))
1062	#endif
1063	{
1064	rc = VERR_EOF;
1065	break;
1066	}
1067	#ifdef HAVE_FWRITE_UNLOCKED
1068	if (ferror_unlocked(pStream->pFile))
1069	#else
1070	if (ferror(pStream->pFile))
1071	#endif
1072	rc = VERR_READ_ERROR;
1073	else
1074	{
1075	AssertMsgFailed(("This shouldn't happen\n"));
1076	rc = VERR_INTERNAL_ERROR;
1077	}
1078	break;
1079	}
1080
1081	/* Deal with null terminator and (lone) new line. */
1082	if (ch == '\0' \|\| ch == '\n')
1083	break;
1084
1085	/* No special character, append it to the return string. */
1086	*pszString++ = ch;
1087	if (--cbString <= 0)
1088	{
1089	rc = VINF_BUFFER_OVERFLOW;
1090	break;
1091	}
1092	}
1093	rtStrmUnlock(pStream);
1094
1095	*pszString = '\0';
1096	if (RT_FAILURE(rc))
1097	ASMAtomicWriteS32(&pStream->i32Error, rc);
1098	}
1099	}
1100	else
1101	{
1102	AssertMsgFailed(("no buffer or too small buffer!\n"));
1103	rc = VERR_INVALID_PARAMETER;
1104	}
1105	return rc;
1106	}
1107
1108
1109	/**
1110	* Flushes a stream.
1111	*
1112	* @returns iprt status code.
1113	* @param pStream The stream to flush.
1114	*/
1115	RTR3DECL(int) RTStrmFlush(PRTSTREAM pStream)
1116	{
1117	if (!fflush(pStream->pFile))
1118	return VINF_SUCCESS;
1119	return RTErrConvertFromErrno(errno);
1120	}
1121
1122
1123	/**
1124	* Output callback.
1125	*
1126	* @returns number of bytes written.
1127	* @param pvArg User argument.
1128	* @param pachChars Pointer to an array of utf-8 characters.
1129	* @param cchChars Number of bytes in the character array pointed to by pachChars.
1130	*/
1131	static DECLCALLBACK(size_t) rtstrmOutput(void pvArg, const char pachChars, size_t cchChars)
1132	{
1133	if (cchChars)
1134	rtStrmWriteLocked((PRTSTREAM)pvArg, pachChars, cchChars, NULL, true /fSureIsText/);
1135	/* else: ignore termination call. */
1136	return cchChars;
1137	}
1138
1139
1140	/**
1141	* Prints a formatted string to the specified stream.
1142	*
1143	* @returns Number of bytes printed.
1144	* @param pStream The stream to print to.
1145	* @param pszFormat IPRT format string.
1146	* @param args Arguments specified by pszFormat.
1147	*/
1148	RTR3DECL(int) RTStrmPrintfV(PRTSTREAM pStream, const char *pszFormat, va_list args)
1149	{
1150	AssertReturn(RT_VALID_PTR(pStream) && pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_PARAMETER);
1151	int rc = pStream->i32Error;
1152	if (RT_SUCCESS(rc))
1153	{
1154	rtStrmLock(pStream);
1155	// pStream->fShouldFlush = true;
1156	rc = (int)RTStrFormatV(rtstrmOutput, pStream, NULL, NULL, pszFormat, args);
1157	rtStrmUnlock(pStream);
1158	Assert(rc >= 0);
1159	}
1160	else
1161	rc = -1;
1162	return rc;
1163	}
1164
1165
1166	/**
1167	* Prints a formatted string to the specified stream.
1168	*
1169	* @returns Number of bytes printed.
1170	* @param pStream The stream to print to.
1171	* @param pszFormat IPRT format string.
1172	* @param ... Arguments specified by pszFormat.
1173	*/
1174	RTR3DECL(int) RTStrmPrintf(PRTSTREAM pStream, const char *pszFormat, ...)
1175	{
1176	va_list args;
1177	va_start(args, pszFormat);
1178	int rc = RTStrmPrintfV(pStream, pszFormat, args);
1179	va_end(args);
1180	return rc;
1181	}
1182
1183
1184	/**
1185	* Dumper vprintf-like function outputting to a stream.
1186	*
1187	* @param pvUser The stream to print to. NULL means standard output.
1188	* @param pszFormat Runtime format string.
1189	* @param va Arguments specified by pszFormat.
1190	*/
1191	RTDECL(void) RTStrmDumpPrintfV(void pvUser, const char pszFormat, va_list va)
1192	{
1193	RTStrmPrintfV(pvUser ? (PRTSTREAM)pvUser : g_pStdOut, pszFormat, va);
1194	}
1195
1196
1197	/**
1198	* Prints a formatted string to the standard output stream (g_pStdOut).
1199	*
1200	* @returns Number of bytes printed.
1201	* @param pszFormat IPRT format string.
1202	* @param args Arguments specified by pszFormat.
1203	*/
1204	RTR3DECL(int) RTPrintfV(const char *pszFormat, va_list args)
1205	{
1206	return RTStrmPrintfV(g_pStdOut, pszFormat, args);
1207	}
1208
1209
1210	/**
1211	* Prints a formatted string to the standard output stream (g_pStdOut).
1212	*
1213	* @returns Number of bytes printed.
1214	* @param pszFormat IPRT format string.
1215	* @param ... Arguments specified by pszFormat.
1216	*/
1217	RTR3DECL(int) RTPrintf(const char *pszFormat, ...)
1218	{
1219	va_list args;
1220	va_start(args, pszFormat);
1221	int rc = RTStrmPrintfV(g_pStdOut, pszFormat, args);
1222	va_end(args);
1223	return rc;
1224	}
1225

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source: vbox/trunk/src/VBox/Runtime/r3/stream.cpp@ 68121

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